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Method for preparation of high purity manganese sulfate and zinc sulfate from waste zinc-manganese batteries

A zinc-manganese battery and manganese sulfate technology are applied in the comprehensive utilization of waste resources and the recycling and utilization of valuable metals in waste zinc-manganese batteries, which can solve the problems of failing to meet the application requirements in the application field and low added value of products, and achieve comprehensive utilization. The effect of strong capacity, high recovery value and high purity

Active Publication Date: 2014-12-24
HUNAN BRUNP RECYCLING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at present, the products obtained by the above methods are only crude products, which cannot meet the requirements of many application fields, and the added value of the products is not high.

Method used

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  • Method for preparation of high purity manganese sulfate and zinc sulfate from waste zinc-manganese batteries
  • Method for preparation of high purity manganese sulfate and zinc sulfate from waste zinc-manganese batteries
  • Method for preparation of high purity manganese sulfate and zinc sulfate from waste zinc-manganese batteries

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Dry the waste alkaline zinc-manganese batteries at 120°C, crush them into powder, and pass through 20 meshes; the main metal analysis of the underscreen is shown in Table 1 below.

[0030] Table 1 Alkaline battery component content

[0031] components

Zn

mn

Fe

Cu

Content (%)

22.6

30.2

20.3

1.5

[0032] Take the undersieve, use 2mol / L sulfuric acid to carry out acid leaching, the reaction temperature is 60 degrees, and when the pH of the reaction end reaches 2.0, filter to obtain the acid leaching filtrate. According to the copper content in the solution, add reduced iron powder according to 1.2 times the theoretical amount to replace the copper in the pickling solution, and when the copper concentration reaches the requirement, filter to obtain the copper-removing filtrate and by-product copper powder. Introduce oxygen into the copper removal filtrate to oxidize ferrous iron in the solution to ferric iron, then rai...

Embodiment 2

[0038] Dry the waste acidic zinc-manganese battery at 100°C, crush it into powder, and pass through a 50-mesh sieve; take the undersieve, use 2mol / L sulfuric acid for acid leaching, the reaction temperature is 50 degrees, and when the pH of the reaction end point reaches 1.5, filter to obtain Acid leaching filtrate. According to the copper content in the solution, add reduced iron powder according to 1.3 times the theoretical amount to replace the copper in the pickling solution. When the copper concentration reaches the requirement, filter the copper removal solution and by-product copper powder. Introduce oxygen into the copper removal solution to oxidize ferrous iron in the solution to ferric iron, then raise the temperature to 90°C, slowly add manganese carbonate, adjust the pH to 4.0, and maintain the reaction for 6 hours, then filter to obtain the iron-removed solution . An appropriate amount of sodium fluoride is added to the solution after iron removal according to th...

Embodiment 3

[0044]Randomly take a pile of waste zinc-manganese batteries, dry them, crush them into powder, and pass through an 80-mesh sieve; take the undersieve, use 1.5mol / L sulfuric acid for acid leaching, the reaction temperature is 70 degrees, and when the pH of the reaction end point reaches 2.0, filter Acid leaching filtrate was obtained. According to the copper content in the solution, add reduced iron powder according to 1.2 times the theoretical amount to replace the copper in the pickling solution. When the copper concentration reaches the requirement, filter the copper removal solution and by-product copper powder. Introduce oxygen into the copper removal solution to oxidize ferrous iron in the solution to ferric iron, then raise the temperature to 85°C, slowly add manganese carbonate, adjust the pH to 4.5, and maintain the reaction for 12 hours, then filter to obtain the iron-removed solution . An appropriate amount of sodium fluoride is added to the solution after iron rem...

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Abstract

The invention discloses a method for preparation of high purity manganese sulfate and zinc sulfate from waste zinc-manganese batteries. Zinc-manganese batteries mainly contain manganese, zinc, iron, copper and other valuable metal components, and by means of sulfuric acid dissolution, iron powder replacement, oxidation neutralizing for iron removal, extraction purification and separation, crystallization and other processes, high purity manganese sulfate and zinc sulfate products can be prepared. The high purity manganese sulfate obtained by the invention can be used for preparation of battery materials, and the high purity zinc sulfate can be used for medicine, feed, food, chemical industry and other fields. The method provided by the invention has the characteristics of high resource utilization and recovery rate, and high product quality, etc.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of waste resources, in particular to the field of recycling valuable metals of waste zinc-manganese batteries. Background technique [0002] As the types and quantities of portable electronic appliances are gradually increasing, the usage of batteries is also increasing day by day, and the amount of waste batteries produced is also increasing. As we all know, waste batteries contain alkaline, acidic, organic electrolytes, heavy metals such as lead, mercury, cadmium, nickel, cobalt, manganese, copper, etc. If they are not treated effectively, they will cause serious pollution to the environment; through water, The entry of food and air into the human body is also a serious threat to human health; in addition, the random loss of waste batteries is also a waste of resources. Therefore, the effective recycling of waste batteries has dual meanings of economic value and social benefit. [0003...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/10C01G9/06
Inventor 李长东唐红辉谭群英刘勇奇王皓王致富
Owner HUNAN BRUNP RECYCLING TECH
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